iTunes Match

After updating both my iPad mini 4 and iPhone 6 to iOS 11.2 recently , iTunes Match no longer works on transferring my music to my iPhone 6, but works fine on my iPad. I'm using iTunes 12.7.1.14 on my Windows 10 Professional desktop, but will not update to iTunes 12.7.2 yet as there seem to be problems. No matter how I add music to iTunes on my PC (purchase, ripping a personal CD to iTunes, using Freegal), iTunes Match doesn't transfer the music to my iPhone6.

After losing most of my songs on my iPhone, I turned off the iCloud Music Library setting on my phone and then synced the missing songs and playlists (including the smart playlists) from my PC. As far as I can tell, all my music is back on my phone.

Has anyone else had this problems after updating to iOS 11.2? Any help will be much appreciated.